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 CES  4. Procedure

_________
 (Ref. Fig. 501/TASK 49-00-00-991-015) Subtask 49-00-00-480-056
 A. Preparation for the Leak Test
 (1) There are two possible procedures to find the location of a pneumatic joint air leak. You can apply dry developer, (Material No. CP3010) and dry around the pneumatic joints. Or you can install aluminum foil around the pneumatic joint location. Use the steps that follow to apply aluminum foil to the pneumatic joint locations:
 (a)
 Wind the foil wrap around the joint one time.

 (b)
 Twist the seam of the foil wrap tight as shown.

 (c)
 Make the foil wrap as tight as possible on the tube but do not rip the wrap.

 (d)
 Attach the foil wrap with MISCELLANEOUS (Material No. 19-010) at both sides of the pneumatic joint.

 Subtask 49-00-00-410-075
 B. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Set the LIGHT control SW 11LJ to the OFF position.

 (3)
 Close the APU access doors 316AR, 315AL and (Ref. TASK 52-41-00-410-001).

 (4)
 Remove the access platform(s).

 (5)
 Remove the warning notice(s). Subtask 49-00-00-865-116

 C.
 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.

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 CES

 Foil Wrap Installation at Pneumatic System Joints
 Figure 501/TASK 49-00-00-991-015

 CES  Subtask 49-00-00-790-055

 D. Air Leak Test
 (1)
 Start the APU (Ref. TASK 49-00-00-860-008).

 (2)
 During APU operation:

 -supply bleed air.

 (3)
 Stop the APU (Ref. TASK 49-00-00-860-009).

 (4)
 Put a warning notice in the cockpit to tell persons not to start the APU.

 Subtask 49-00-00-865-117
 E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
 Subtask 49-00-00-010-072
 F. Get Access
 (1)
 Put the access platform in position below the APU access doors 315AL and 316AR.

 (2)
 Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).

 (3)
 Set the LIGHT control SW 11LJ to the ON position. Subtask 49-00-00-080-056

 G.
 Make sure that there no leaks at the joint location, and remove the materials used to check leaks.

 5. Close-up
________ Subtask 49-00-00-410-076
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Set the LIGHT control SW 11LJ to the OFF position.

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 CES  (3) Close the APU access doors 316AR, 315AL (Ref. TASK 52-41-00-410-001).

 (4)
 Remove the access platform(s). Subtask 49-00-00-865-118

 B.
 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.

 Subtask 49-00-00-860-106
 C. Aircraft Maintenance Configuration
 (1)
 Pressurize the reservoirs of the hydraulic systems.
 (Ref. TASK 29-14-00-614-002).

 (2)
 De-energize the ground service network
 (Ref. TASK 24-42-00-862-001).

 (3)
 Remove the warning notice(s).

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 CES

 AIRBORNE AUXILIARY POWER - GENERAL ((APS 3200)) - ADJUSTMENT/TEST
_________________________________________________________________ TASK 49-00-00-710-005 Self-Test of the ECB (APS 3200)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002  Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 31-32-00-860-001 Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
　
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